Journeyman Lineman EXAM QUESTIONS WITH ACTUAL CORRECT DETAILED ANSWERS
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Journeyman Lineman
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Journeyman Lineman
Journeyman Lineman EXAM QUESTIONS WITH ACTUAL
CORRECT DETAILED ANSWERS
Journeyman Lineman EXAM QUESTIONS WITH ACTUAL
CORRECT DETAILED ANSWERS
Journeyman Lineman EXAM QUESTIONS WITH ACTUAL
CORRECT DETAILED ANSWERS
Journeyman Lineman EXAM QUESTIONS WITH ACTUAL
CORRECT DETAILED ANSWERS
Jou...
Journeyman Lineman EXAM QUESTIONS WITH ACTUAL
CORRECT DETAILED ANSWERS
Delta Secondary Voltages?
Delta doubles (Phase to phase is always 2 x Phase to neutral.)
WYE Secondary Voltages?
Phase to phase is always 1.73 x phase to neutral
Shoring and Latter placement?
3 4 5-Shoring
Latter extends 3' past rest point
At 4' you need a ladder
At 5' you need shoring
1 Ladders every 25'
What causes resistance in a conductor?
The Type: Copper/ACSR,
Size, Length, and Temperature (the more heat more resistance.)
How do you take a capacitor off line?
Open oil switch or open cutout with load break. The internal resistor should bleed the voltage to 50 volts
or less in 5 min. Then shunt and ground the capacitors.
What do capacitors do?
Improve power factor, when the current is lagging the voltage.
Why does a recloser stay energized longer on the 3rd or 4th shot?
To allow a fuse to blow if there is a tree fault and also to narrow down the area of the fault after the fuse
blows.
The reason it holds open is to allow an sectionalizer to open cause it operates under no voltage.
What determines the strength of a magnetic field?
the current
,Types of over current protection?
Circuit breaker, Recloser-OCR, and Cutout.
Can you look at a circuit breaker and determine the line voltage?
NO (Because they are not rated in voltage just amps)
In CPR how many chest compressions are needed to how many breaths?
30 Chest compressions to 2 Breaths 30-2
How would you parallel two regulators?
Leave them on the step they were at, lock them down, and turn them off. Once the work is complete put
back to manual. OR take one or both off line and do the same thing.
LTC is powered by?
PT by volts
Safe working limits with ropes?
If the breaking strength of a rope is 5,000lbs and the assigned WLL is 1,000lbs then the safety factor is 5.
Color of service lines on vehicles?
Red- Emergency
Blue- Service
Green- Electrical
How much bigger do you need to drill a hole in a wood pole?
1/16" bigger (Example 3/4" bolt = 13/16" Hole)
How often do you need to electrically test live line tools?
Every 2 years (100,000 volts for fiber glass, 75,000 volts for wood.)
At what size do transformers start being subtractive not additive?
200 KVA and up or 8660 Volts.
At what depth do you need egress and digress in the ditch?
4ft deep and a latter every 25ft
How far back does the spoil pile need to be from the edge of the ditch?
2ft back
5 things that are needed on the Job Briefing?
Hazards, Work Procedures, Special Precautions, Energy Source Control, and PPE.
How many times does a sine wave cross 0°?
, 3 Times
What is step potential?
When one foot is at a different electrical potential then the other.
What is touch potential?
When you touch something at a different electrical potential from your feet or other hand.
At what kVA do transformers have 4 bushings?
Above 100kVA has 4 bushings
What do you do with the neutral on a WYE-Delta bank?
Float, always
What do you do with the neutral on a open wye-open delta?
Always tie to system neutral
In a delta system phase current =_?_
1.73 X Line Current,
Phase current = Coil Current
What needs to be checked before paralleling two transformers?
The Impedance needs to be + or - 10%
Where should tap changers be set at _?_
at 100% For normal operation
What is the displacement of a WYE-Delta or a Delta-WYE?
30° or 210°
What is the displacement of a WYE-WYE or a Delta-Delta bank?
0° or 180°
What does current determine?
the magnetic strength
What is the smallest size of wire allowed on grounding equipment?
#2 Copper
What does a PT sense?
Voltage
What does a CT sense?
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